linux-kernel - Re: [PATCH] Input: cros_ec_keyb: Remove check before calling pm_wakeup

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Date:   Tue, 12 Jun 2018 16:32:16 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Ravi Chandra Sadineni <ravisadineni@...omium.org>
Cc:     ravisadineni@...gle.com, dtor@...gle.com, tbroch@...gle.com,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH] Input: cros_ec_keyb: Remove check before calling
 pm_wakeup_event.

On Tue, Jun 05, 2018 at 03:44:57PM -0700, Ravi Chandra Sadineni wrote:
> Remove the unnecessary check before calling pm_wakeup_event. If the
> device is not wake enabled, this call is no-op anyway.
> 
> Signed-off-by: Ravi Chandra Sadineni <ravisadineni@...omium.org>

Applied, thank you.

> ---
>  drivers/input/keyboard/cros_ec_keyb.c | 30 ++++++++++-----------------
>  1 file changed, 11 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
> index 489ddd37bd4ee..c5e32544130dc 100644
> --- a/drivers/input/keyboard/cros_ec_keyb.c
> +++ b/drivers/input/keyboard/cros_ec_keyb.c
> @@ -242,19 +242,17 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
>  	u32 val;
>  	unsigned int ev_type;
>  
> +	/*
> +	 * If not wake enabled, discard key state changes during
> +	 * suspend. Switches will be re-checked in
> +	 * cros_ec_keyb_resume() to be sure nothing is lost.
> +	 */
> +	if (queued_during_suspend && !device_may_wakeup(ckdev->dev))
> +		return NOTIFY_OK;
> +
>  	switch (ckdev->ec->event_data.event_type) {
>  	case EC_MKBP_EVENT_KEY_MATRIX:
> -		if (device_may_wakeup(ckdev->dev)) {
> -			pm_wakeup_event(ckdev->dev, 0);
> -		} else {
> -			/*
> -			 * If keyboard is not wake enabled, discard key state
> -			 * changes during suspend. Switches will be re-checked
> -			 * in cros_ec_keyb_resume() to be sure nothing is lost.
> -			 */
> -			if (queued_during_suspend)
> -				return NOTIFY_OK;
> -		}
> +		pm_wakeup_event(ckdev->dev, 0);
>  
>  		if (ckdev->ec->event_size != ckdev->cols) {
>  			dev_err(ckdev->dev,
> @@ -268,10 +266,7 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
>  		break;
>  
>  	case EC_MKBP_EVENT_SYSRQ:
> -		if (device_may_wakeup(ckdev->dev))
> -			pm_wakeup_event(ckdev->dev, 0);
> -		else if (queued_during_suspend)
> -			return NOTIFY_OK;
> +		pm_wakeup_event(ckdev->dev, 0);
>  
>  		val = get_unaligned_le32(&ckdev->ec->event_data.data.sysrq);
>  		dev_dbg(ckdev->dev, "sysrq code from EC: %#x\n", val);
> @@ -280,10 +275,7 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
>  
>  	case EC_MKBP_EVENT_BUTTON:
>  	case EC_MKBP_EVENT_SWITCH:
> -		if (device_may_wakeup(ckdev->dev))
> -			pm_wakeup_event(ckdev->dev, 0);
> -		else if (queued_during_suspend)
> -			return NOTIFY_OK;
> +		pm_wakeup_event(ckdev->dev, 0);
>  
>  		if (ckdev->ec->event_data.event_type == EC_MKBP_EVENT_BUTTON) {
>  			val = get_unaligned_le32(
> -- 
> 2.18.0.rc1.242.g61856ae69a-goog
> 

-- 
Dmitry